Boiler-scraper.



No. 829,024.' PATENTED AUG. 21, 1906A F. LUDWIG. BOILBR SGRAPER.

APPLIOATION' FILED '601231, 1904.

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FRANK LUDWIG, OF MONTROSE, COLORADO.

BOILER-SCRAPER.

Specification of Letters Patent.

Patented Aug. 21, 1906.

-Applicatimi led October 31,1904. Serial No. 230,778.

To af/Z whom, it may oon/cern;

Be it known that I, FRANK LUDWIG, a citizen of the United States, residing at Montrose, in the county of Montrose and State of Colorado, have invented certain new and useful Improvements in Boiler-Scrapers, and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to steam-boiler cleaners or Scrapers, and has for its object to provide a device which will quickly and effectually clean the mud and scales out of a steamboiler while pressure is in the boiler.

With this object in view my invention consists in the novel construction of the valve and sliding rod employed in my device.

My invention also consists in certain other novel features of construction and in combinations of parts, which will be iirst fully described, and afterward specifically pointed out in the appended claim.

Referring to the accompanying drawings, Figure 1 is a vertical sectional view showing the boiler-cleaner in an operative position. Fig. 2 is a similar view showing the same in a locked position when not in use. Fig. 3 is a sectional view taken on line 3 3 of Fig. 1, showing hoe or scraper in elevation; and Fig. 4 is an elevation of the device, showing the hand-plate.

Like numerals of reference indicate the same parts throughout the several figures, in

which 1 'indicates the hand-plate, which is designed to be bolted on the inside of the handhole of a boiler, and 2 indicates horizontal clamps designed to bear against the outside of the boiler to hold the device rigidly in position.

3 indicates the projecting valve-seat, which extends within the boiler, which valve-seat is provided on its outside with a small lockingvalve seat 4, the opening within the said valve-seat being of a size to permit the rod 1 1 a free vertical and lateral movement within the boiler.

5 indicates the ball-valve, which is ground to iit the valve-seat 3, and 6 indicates a cap located within the valve-seat 3 and held in position by a locking-nut 7, threaded internally within the valve-seat 3. The said ballvalve 5 is provided with a cylindrical extension 8, havingI a threaded end 9, and said ballvalve and extension is provided with an opening 10, extending entirely through the same.

11 indicates a hollow rod which is designed to snugly iit the said opening 10 in the ballvalve 5, and carried on the inner end of said hollow rod 11 is a scraper 12, shaped, preferably, as shown in Fig. 3, or a steel brush may be employed in place of this scraper. Formed behind the said scraper 12 is a valve 13, and the inner end of the hollow rod 11 is internally threaded. The rod 14 extends within said hollow rod 11, the outer portion of said rod 14 being covered by the hollow rod 15, said hollow rod 15 meeting the hollow rod 11 at the point 16, making a sung tight joint, as shown in Fig. 1. A handle 17 is formed on the rod 14, as shown.

18 indicates a locking packing-nut which is threaded on the extension 8 of the ballvalve 5, and 19 indicates a protecting-cap which is threaded on the outside of the threaded portion 20 of the valve-seat 3.

Having thus fully described the several parts of my invention, its operation is as follows: The ball-valve 5 being ground steamtight to the valve-seat 3 and cap 6, said valve may be swung or turned into any position without allowing steam to pass around the same. In order, therefore, to clean the boiler of mud or scales, the scraper is operated in any desired'position. When, however, the device is not being used, the scraper is drawn until the valve 13 is seated in the valve-seat 4, which causes the rod 11 to be held centrally within the hand-plate and prevents any vertical or lateral play of said rod. The rod 14 is then unthreaded out of the hollow rod 11, and the packing lock-nut 18 is given a few turns, which locks the said hollow rod inthe position as shown in Fig. 2, thus securely holding the valve 13 within its seat 4.

The cap 19 is then threaded on the portion 20,

as shown in Fig. 2, which effectually protects the device from heat or fire, and said cap 20 is provided with a perforation 21, which allows any water or steam which might pass through the device to run out.

Having thus set forth the several parts of my invention, I do not wish to be understood as limiting myself to the exact construction as herein set forth, as various slight changes may be made therein which would fall within the limit and scope of my inven- IOO IIO

tion, and I consider myself clearly entitled to all such changes and modifications.

What I claim as my invention, and desire to secure by Letters Patent of the United States, is-

In a boiler cleaner or scraper, the combination of a hand-'plate adapted to be secured in the hand-hole of a boiler, a valve-seat in said hand-plate, a ball-valve within said valvesea-t, .a rod ada ted to operate through said' movement, means for scraping the boiler secured to the inner `end of said rod and a valve behind said scraping means adapted to be seated on said locking-valve seat to hold said rod in a central position within said handplate when the device is not in use, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

FRANK LUDWIG.'

Witnesses:

B. G. SMITH, S. P. CARPENDER 

